The defence commissioned the video but chose not to use it as part of their case - and they are furious it has been broadcast.

Video:Pistorius Trial: Monday's Hearing

The footage shows Pistorius running on his stumps and miming shooting - and though Mr Nel did not refer to it in court, he suggested Professor Derman's claims about the defendant's lack of mobility were not accurate.

The physician maintained that Pistorius could not flee "as you or I" could - but conceded under questioning that fleeing to another room would have been an "option".

Professor Derman also admitted that having a gun made the athlete "less vulnerable" on the night.

Sky's Emma Hurd was in court and said the video broadcast in Australia was an "elephant in the room".

"Gerrie Nel has asked Professor Derman about the level of movement Pistorius would have had," she said.

Video:Oscar Pistorius Arrives At Court

"The video has not been mentioned explicitly but has been hinted at, so we're not expecting it to be introduced as evidence."

Pistorius, who is on trial for premeditated murder, denies deliberately killing his girlfriend, claiming he mistook her for an intruder.

He faces between 25 years and life in prison if found guilty.

The trial has been adjourned until Tuesday morning, when the defence is expected to close its case.